Embarrassing😔

So I’m 20 and I live with my husband. Before that I lived with my parents or roommates but never by myself... whenever my husband leaves town for work I am so scared to stay by myself and get freaked out even if I hear the smallest noise... I feel like I should be able to stay by myself and be fine but every time I get scared like this... any tips on how not to? I Have two big dogs but it still doesn’t make me feel better.